Change the law (7)
I believe the answer is:
coppers
'change' is the definition.
(as in copper coins)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for coppers that I've seen before include "loose change?" , "Old pennies and policemen" , "Pence" , "The boys in blue (slang)" , "hardly any 11 [LOLLY]" .)